21.   On Wednesday, the new arm will hand off its packing crate to a smaller arm attached to the shuttle.

22.   On one dusty, trash-filled street, lined with shacks built with packing crates and tarpaulins, Julio Mercador spends his days hanging around.

23.   On Wednesday, the new arm will hand off its packing crate to the shuttle arm in a handshake.

24.   The grand finale will be when the two jointed arms exchange a packing crate.

25.   The grand finale will come when the two jointed arms exchange a packing crate.